<div id="content">
    <div id="title">密码修改</div>
    <div id="user"></div>
    <div id="student">

        <table>
            <tr><th>新密码：</th><td><input type="password" name="psw" required id="psw" onchange="getpassword(this)"></td></tr>
            <tr><th>确认密码：</th><td><input type="password" required onchange="getpassword2(this)"></td></tr>
            <tr><td></td><td><input  type="submit" value="确　定" onclick="update()"></td></tr>
        </table>

    </div>

</div>